mcs/class/referencesource/System.Xml/System/Xml/Xslt/XsltArgumentList.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="XsltArgumentList.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 //------------------------------------------------------------------------------
   7
   8 using System.Collections;
   9 using System.Security.Permissions;
  10
  11 namespace System.Xml.Xsl {
  12
  13     public abstract class XsltMessageEncounteredEventArgs : EventArgs {
  14         public abstract string Message { get; }
  15     }
  16
  17     public delegate void XsltMessageEncounteredEventHandler(object sender, XsltMessageEncounteredEventArgs e);
  18
  19     public class XsltArgumentList {
  20         private Hashtable parameters = new Hashtable();
  21         private Hashtable extensions = new Hashtable();
  22
  23         // Used for reporting xsl:message's during execution
  24         internal XsltMessageEncounteredEventHandler xsltMessageEncountered = null;
  25
  26         public XsltArgumentList() {}
  27
  28         public object GetParam(string name, string namespaceUri) {
  29             return this.parameters[new XmlQualifiedName(name, namespaceUri)];
  30         }
  31
  32         public object GetExtensionObject(string namespaceUri) {
  33             return this.extensions[namespaceUri];
  34         }
  35
  36         public void AddParam(string name, string namespaceUri, object parameter) {
  37             CheckArgumentNull(name        , "name"        );
  38             CheckArgumentNull(namespaceUri, "namespaceUri");
  39             CheckArgumentNull(parameter   , "parameter"   );
  40
  41             XmlQualifiedName qname = new XmlQualifiedName(name, namespaceUri);
  42             qname.Verify();
  43             this.parameters.Add(qname, parameter);
  44         }
  45
  46         public void AddExtensionObject(string namespaceUri, object extension) {
  47             CheckArgumentNull(namespaceUri, "namespaceUri");
  48             CheckArgumentNull(extension   , "extension"   );
  49             this.extensions.Add(namespaceUri, extension);
  50         }
  51
  52         public object RemoveParam(string name, string namespaceUri) {
  53             XmlQualifiedName qname = new XmlQualifiedName(name, namespaceUri);
  54             object parameter = this.parameters[qname];
  55             this.parameters.Remove(qname);
  56             return parameter;
  57         }
  58
  59         public object RemoveExtensionObject(string namespaceUri) {
  60             object extension = this.extensions[namespaceUri];
  61             this.extensions.Remove(namespaceUri);
  62             return extension;
  63         }
  64
  65         public event XsltMessageEncounteredEventHandler XsltMessageEncountered {
  66             add {
  67                 xsltMessageEncountered += value;
  68             }
  69             remove {
  70                 xsltMessageEncountered -= value;
  71             }
  72         }
  73
  74         public void Clear() {
  75             this.parameters.Clear();
  76             this.extensions.Clear();
  77             xsltMessageEncountered = null;
  78         }
  79
  80         private static void CheckArgumentNull(object param, string paramName) {
  81             if (param == null) {
  82                 throw new ArgumentNullException(paramName);
  83             }
  84         }
  85     }
  86 }